2011/9/15, KD KD <pic24hj at gmail.com>: I tested the Ipad the other day and found the panel could be polyphonic! What kind of touch technology are involved in the Ipad? Capacitive? Sound wave or IR? KD Sonica. http://m.matrixsynth.com/2010/07/frank-eventoff-sonica-synth-serge.html